Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Core / CSharp / MS / Win32 / UnsafeNativeMethodsTablet.cs / 1305600 / UnsafeNativeMethodsTablet.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- using System; using System.Text; using System.Security; using System.Security.Permissions; using System.Runtime.InteropServices; using System.Runtime.ConstrainedExecution; using System.Windows.Ink; using System.Diagnostics; using MS.Win32; namespace MS.Win32.Recognizer { // // Tablet unsafe native methods structs and pinvokes used by PresentationCore // internal static class UnsafeNativeMethods { ////// Critical: as suppressing UnmanagedCodeSecurity /// [SecurityCritical, SuppressUnmanagedCodeSecurity] [DllImport(ExternDll.Mshwgst, CallingConvention = CallingConvention.Winapi)] internal static extern int CreateRecognizer([In] ref Guid clsid, [Out] out RecognizerSafeHandle hRec); ////// Critical: as suppressing UnmanagedCodeSecurity /// [SecurityCritical, SuppressUnmanagedCodeSecurity] [DllImport(ExternDll.Mshwgst, CallingConvention = CallingConvention.Winapi)] internal static extern int DestroyRecognizer([In] IntPtr hRec); ////// Critical: as suppressing UnmanagedCodeSecurity /// [SecurityCritical, SuppressUnmanagedCodeSecurity] [DllImport(ExternDll.Mshwgst, CallingConvention = CallingConvention.Winapi)] internal static extern int CreateContext([In] RecognizerSafeHandle hRec, [Out] out ContextSafeHandle hRecContext); ////// Critical: as suppressing UnmanagedCodeSecurity /// [SecurityCritical, SuppressUnmanagedCodeSecurity] [DllImport(ExternDll.Mshwgst, CallingConvention = CallingConvention.Winapi)] internal static extern int DestroyContext([In] IntPtr hRecContext); ////// Critical: as suppressing UnmanagedCodeSecurity /// [SecurityCritical, SuppressUnmanagedCodeSecurity] [DllImport(ExternDll.Mshwgst, CallingConvention = CallingConvention.Winapi)] internal static extern int AddStroke([In] ContextSafeHandle hRecContext, [In] ref PACKET_DESCRIPTION packetDesc, [In] uint cbPackets, [In] IntPtr pByte, [In, MarshalAs(UnmanagedType.LPStruct)] NativeMethods.XFORM xForm); ////// Critical: as suppressing UnmanagedCodeSecurity /// [SecurityCritical, SuppressUnmanagedCodeSecurity] [DllImport(ExternDll.Mshwgst, CallingConvention = CallingConvention.Winapi)] internal static extern int SetEnabledUnicodeRanges([In] ContextSafeHandle hRecContext, [In] uint cRangs, [In] CHARACTER_RANGE[] charRanges); ////// Critical: as suppressing UnmanagedCodeSecurity /// [SecurityCritical, SuppressUnmanagedCodeSecurity] [DllImport(ExternDll.Mshwgst, CallingConvention = CallingConvention.Winapi)] internal static extern int EndInkInput([In] ContextSafeHandle hRecContext); ////// Critical: as suppressing UnmanagedCodeSecurity /// [SecurityCritical, SuppressUnmanagedCodeSecurity] [DllImport(ExternDll.Mshwgst, CallingConvention = CallingConvention.Winapi)] internal static extern int Process([In] ContextSafeHandle hRecContext, [Out] out bool partialProcessing); ////// Critical: as suppressing UnmanagedCodeSecurity /// [SecurityCritical, SuppressUnmanagedCodeSecurity] [DllImport(ExternDll.Mshwgst, CallingConvention = CallingConvention.Winapi)] internal static extern int GetAlternateList([In] ContextSafeHandle hRecContext, [In, Out] ref RECO_RANGE recoRange, [In, Out] ref uint cAlts, [In, Out] IntPtr[] recAtls, [In] ALT_BREAKS breaks); ////// Critical: as suppressing UnmanagedCodeSecurity /// [SecurityCritical, SuppressUnmanagedCodeSecurity] [DllImport(ExternDll.Mshwgst, CallingConvention = CallingConvention.Winapi)] internal static extern int DestroyAlternate([In] IntPtr hRecAtls); ////// Critical: as suppressing UnmanagedCodeSecurity /// [SecurityCritical, SuppressUnmanagedCodeSecurity] [DllImport(ExternDll.Mshwgst, CallingConvention = CallingConvention.Winapi, CharSet = CharSet.Unicode)] internal static extern int GetString([In] IntPtr hRecAtls, [Out] out RECO_RANGE recoRange, [In, Out]ref uint size, [In, Out] StringBuilder recoString); ////// Critical: as suppressing UnmanagedCodeSecurity /// [SecurityCritical, SuppressUnmanagedCodeSecurity] [DllImport(ExternDll.Mshwgst, CallingConvention = CallingConvention.Winapi)] internal static extern int GetConfidenceLevel([In] IntPtr hRecAtls, [Out] out RECO_RANGE recoRange, [Out] out RecognitionConfidence confidenceLevel); ////// Critical: as suppressing UnmanagedCodeSecurity /// [SecurityCritical, SuppressUnmanagedCodeSecurity] [DllImport(ExternDll.Mshwgst, CallingConvention = CallingConvention.Winapi)] internal static extern int ResetContext([In] ContextSafeHandle hRecContext); ////// Critical: as suppressing UnmanagedCodeSecurity /// [SecurityCritical, SuppressUnmanagedCodeSecurity] [DllImport(ExternDll.Mshwgst, CallingConvention = CallingConvention.Winapi)] internal static extern int GetLatticePtr([In] ContextSafeHandle hRecContext, [In] ref IntPtr pRecoLattice); } ////// RecognizerSafeHandle /// ////// Critical: Marked critical to prevent inadvertant spread to transparent code. /// [SecurityCritical] internal class RecognizerSafeHandle : SafeHandle { // Called by P/Invoke when returning SafeHandles ////// Critical: This code calls into a base class which is protected by link demand and by inheritance demand /// [SecurityCritical] private RecognizerSafeHandle() : this(true) { } ////// Critical: This code calls into a base class which is protected by link demand and by inheritance demand /// [SecurityCritical] private RecognizerSafeHandle(bool ownHandle) : base(IntPtr.Zero, ownHandle) { } // Do not provide a finalizer - SafeHandle's critical finalizer will // call ReleaseHandle for you. ////// Critical: This code calls into a base class which is protected by link demand an by inheritance demand. /// Also the code accessed the SecurityCritical member - handle. /// public override bool IsInvalid { [SecurityCritical] [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] get { return IsClosed || handle == IntPtr.Zero; } } ////// Critical: Calls a SecurityCritical method /// NativeRecognizer.UnsafeNativeMethods.DestroyRecognizer /// [SecurityCritical] [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] override protected bool ReleaseHandle() { Debug.Assert(handle != IntPtr.Zero); return (MS.Internal.HRESULT.Succeeded(MS.Win32.Recognizer.UnsafeNativeMethods.DestroyRecognizer(handle))); } } ////// ContextSafeHandle /// ////// Critical: Marked critical to prevent inadvertant spread to transparent code. /// [SecurityCritical] internal class ContextSafeHandle : SafeHandle { // Called by P/Invoke when returning SafeHandles ////// Critical:This code calls into a base class which is protected by link demand an by inheritance demand /// [SecurityCritical] private ContextSafeHandle() : this(true) { } ////// Critical:This code calls into a base class which is protected by link demand an by inheritance demand /// [SecurityCritical] private ContextSafeHandle(bool ownHandle) : base(IntPtr.Zero, ownHandle) { } // Do not provide a finalizer - SafeHandle's critical finalizer will // call ReleaseHandle for you. ////// Critical: This code calls into a base class which is protected by link demand an by inheritance demand. /// Also the code accessed the SecurityCritical member - handle. /// public override bool IsInvalid { [SecurityCritical] [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] get { return IsClosed || handle == IntPtr.Zero; } } ////// Critical: Calls a SecurityCritical method /// NativeRecognizer.UnsafeNativeMethods.DestroyContext /// [SecurityCritical] [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] override protected bool ReleaseHandle() { //Note: It is not an error to have already called DestroyRecognizer //which makes _recognizerHandle.IsInvalid == true before calling //DestroyContext. I have removed this assert, but left it commented for //context. //Debug.Assert(_recognizerHandle != null && !_recognizerHandle.IsInvalid); Debug.Assert(handle != IntPtr.Zero); int hr = MS.Win32.Recognizer.UnsafeNativeMethods.DestroyContext(handle); // Now, dereference the attached recognizer. _recognizerHandle = null; return MS.Internal.HRESULT.Succeeded(hr); } ////// Critical: Accesses the SecurityCritical member _recognizerHandle /// [SecurityCritical] internal void AddReferenceOnRecognizer(RecognizerSafeHandle handle) { System.Diagnostics.Debug.Assert(_recognizerHandle == null); _recognizerHandle = handle; } ////// Critical: This is a handle to our recognizer, we consider it plutonium /// [SecurityCritical] private RecognizerSafeHandle _recognizerHandle; } // The structure has been copied from public\internal\drivers\inc\tpcshrd.h //typedef struct _PROPERTY_METRICS // { // LONG nLogicalMin; // LONG nLogicalMax; // PROPERTY_UNITS Units; // FLOAT fResolution; // } PROPERTY_METRICS; [StructLayout(LayoutKind.Sequential)] internal struct PROPERTY_METRICS { public int nLogicalMin; public int nLogicalMax; public int Units; public float fResolution; } // The structure has been copied from public\internal\drivers\inc\tpcshrd.h //typedef struct _PACKET_PROPERTY // { // GUID guid; // PROPERTY_METRICS PropertyMetrics; // } PACKET_PROPERTY; [StructLayout(LayoutKind.Sequential)] internal struct PACKET_PROPERTY { public Guid guid; public PROPERTY_METRICS PropertyMetrics; } // The structure has been copied from public\internal\drivers\inc\tpcshrd.h //typedef struct _PACKET_DESCRIPTION // { // ULONG cbPacketSize; // ULONG cPacketProperties; // PACKET_PROPERTY *pPacketProperties; // ULONG cButtons; // GUID *pguidButtons; // } PACKET_DESCRIPTION; [StructLayout(LayoutKind.Sequential)] internal struct PACKET_DESCRIPTION { public uint cbPacketSize; public uint cPacketProperties; public IntPtr pPacketProperties; public uint cButtons; public IntPtr pguidButtons; }; // The structure has been copied from public\internal\drivers\inc\rectypes.h //typedef struct tagCHARACTER_RANGE // { // WCHAR wcLow; // USHORT cChars; // } CHARACTER_RANGE [StructLayout(LayoutKind.Sequential)] internal struct CHARACTER_RANGE { public ushort wcLow; public ushort cChars; } // The structure has been copied from public\internal\drivers\inc\rectypes.h //typedef struct tagRECO_RANGE // { // ULONG iwcBegin; // ULONG cCount; // } RECO_RANGE; [StructLayout(LayoutKind.Sequential)] internal struct RECO_RANGE { public uint iwcBegin; public uint cCount; } // The structure has been copied from public\internal\drivers\inc\rectypes.h //enum enumALT_BREAKS // { ALT_BREAKS_SAME = 0, // ALT_BREAKS_UNIQUE = 1, // ALT_BREAKS_FULL = 2 // } ALT_BREAKS; internal enum ALT_BREAKS { ALT_BREAKS_SAME = 0, ALT_BREAKS_UNIQUE = 1, ALT_BREAKS_FULL = 2 } // The structure has been copied from public\internal\drivers\inc\rectypes.h //enum enumRECO_TYPE // { RECO_TYPE_WSTRING = 0, // RECO_TYPE_WCHAR = 1 // } RECO_TYPE; // internal enum RECO_TYPE : ushort //{ // RECO_TYPE_WSTRING = 0, // RECO_TYPE_WCHAR = 1 //} // The structure has been copied from public\internal\drivers\inc\rectypes.h //typedef struct tagRECO_LATTICE_PROPERTY // { // GUID guidProperty; // USHORT cbPropertyValue; // BYTE *pPropertyValue; // } RECO_LATTICE_PROPERTY; [StructLayout(LayoutKind.Sequential)] internal struct RECO_LATTICE_PROPERTY { public Guid guidProperty; public ushort cbPropertyValue; public IntPtr pPropertyValue; } // The structure has been copied from public\internal\drivers\inc\rectypes.h //typedef struct tagRECO_LATTICE_PROPERTIES // { // ULONG cProperties; // RECO_LATTICE_PROPERTY **apProps; // } RECO_LATTICE_PROPERTIES; [StructLayout(LayoutKind.Sequential)] internal struct RECO_LATTICE_PROPERTIES { public uint cProperties; public IntPtr apProps; } // The structure has been copied from public\internal\drivers\inc\rectypes.h //typedef int RECO_SCORE; // //typedef struct tagRECO_LATTICE_ELEMENT // { // RECO_SCORE score; // WORD type; // BYTE *pData; // ULONG ulNextColumn; // ULONG ulStrokeNumber; // RECO_LATTICE_PROPERTIES epProp; // } RECO_LATTICE_ELEMENT; [StructLayout(LayoutKind.Sequential)] internal struct RECO_LATTICE_ELEMENT { public int score; public ushort type; public IntPtr pData; public uint ulNextColumn; public uint ulStrokeNumber; public RECO_LATTICE_PROPERTIES epProp; } // The structure has been copied from public\internal\drivers\inc\rectypes.h //typedef struct tagRECO_LATTICE_COLUMN // { // ULONG key; // RECO_LATTICE_PROPERTIES cpProp; // ULONG cStrokes; // ULONG *pStrokes; // ULONG cLatticeElements; // RECO_LATTICE_ELEMENT *pLatticeElements; // } RECO_LATTICE_COLUMN; [StructLayout(LayoutKind.Sequential)] internal struct RECO_LATTICE_COLUMN { public uint key; public RECO_LATTICE_PROPERTIES cpProp; public uint cStrokes; public IntPtr pStrokes; public uint cLatticeElements; public IntPtr pLatticeElements; } // The structure has been copied from public\internal\drivers\inc\rectypes.h //typedef struct tagRECO_LATTICE // { // ULONG ulColumnCount; // RECO_LATTICE_COLUMN *pLatticeColumns; // ULONG ulPropertyCount; // GUID *pGuidProperties; // ULONG ulBestResultColumnCount; // ULONG *pulBestResultColumns; // ULONG *pulBestResultIndexes; // } RECO_LATTICE; [StructLayout(LayoutKind.Sequential)] internal struct RECO_LATTICE { public uint ulColumnCount; public IntPtr pLatticeColumns; public uint ulPropertyCount; public IntPtr pGuidProperties; public uint ulBestResultColumnCount; public IntPtr pulBestResultColumns; public IntPtr pulBestResultIndexes; } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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